package com.itheima.controller;


import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;

import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.itheima.common.R;
import com.itheima.entity.Employee;
import com.itheima.service.EmployeeService;

import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang.StringUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.util.DigestUtils;
import org.springframework.web.bind.annotation.*;

import javax.servlet.http.HttpServletRequest;
import java.time.LocalDateTime;
import java.util.List;

@Slf4j
@RestController
@RequestMapping("employee")
public class EmployeeController {
   @Autowired
    private EmployeeService employeeService;

    /**
     * 员工登录
     * @param request
     * @param employee
     * @return
     */
    @PostMapping("login")
    public R<Employee> login(HttpServletRequest request, @RequestBody Employee employee){
/**
 * 1、特页面提交的密码password进行md5加密处理
 * 2、根据页面提交的用户名username查询数据库
 * 3、如果没有查询到则返回登录失败结果
 * 4、密码比对，如果不一致则返回登录失败结果
 * 5、查看员工状态，如果为已禁用状态，则返回员工已禁用结果
 * 6、登录成功，将员工id存入Session并返回登录成功结果
 */
        //* 1、特页面提交的密码password进行md5加密处理
        String password = employee.getPassword();
        password = DigestUtils.md5DigestAsHex(password.getBytes());
        // * 2、根据页面提交的用户名username查询数据库
       LambdaQueryWrapper<Employee> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(Employee::getUsername,employee.getUsername());
        Employee emp = employeeService.getOne(queryWrapper);

        //* 3、如果没有查询到则返回登录失败结果
        if (emp == null){
            return R.error("登陆失败");
        }
        // * 4、密码比对，如果不一致则返回登录失败结果
        if (!emp.getPassword().equals(password)){
            return R.error("登陆失败");
        }

        // * 5、查看员工状态，如果为已禁用状态，则返回员工已禁用结果
        if (emp.getStatus()==0){
            return R.error("账号已禁用");
        }
        // * 6、登录成功，将员工id存入Session并返回登录成功结果
        request.getSession().setAttribute("employee",emp.getId());
        return R.success(emp);

    }


    /**
     * 员工退出
     * @param request
     * @return
     */
    @PostMapping("/logout")
    public R<String> logout(HttpServletRequest request){
        //清理session中保存的当前登录员工的id
        request.getSession().removeAttribute("employee");
        return R.success("退出成功");

    }

    /**
     * 新增员工
     * @return
     */
    @PostMapping
    public R<String> save(HttpServletRequest request, @RequestBody Employee employee){
        log.info("新增员工 {}" ,employee);

//        设置初始密码,md5加密
        employee.setPassword(DigestUtils.md5DigestAsHex("123456".getBytes()));

/*  使用公共字段填充替代
      employee.setCreateTime(LocalDateTime.now());
        employee.setUpdateTime(LocalDateTime.now());
//        获取当前登录的id
        Long empId = (Long) request.getSession().getAttribute("employee");
        employee.setUpdateUser(empId);
        employee.setCreateUser(empId);*/


        employeeService.save(employee);
        return R.success("新增员工成功");
    }

    /**
     * 员工分页查询
     * @param page
     * @param pageSize
     * @param name
     * @return page是mp提供的分页插件
     */
    @GetMapping("/page")
    public R<Page> page(int page,int pageSize ,String name){
        log.info("page ={}, pagesize ={} ,Name = {}",page,pageSize,name);
        //构造分页构造器
        Page pageInfo = new Page(page,pageSize);

        //构造条件构造器
        LambdaQueryWrapper <Employee>queryWrapper = new LambdaQueryWrapper<>();
        //添加过滤条件
        queryWrapper.like(StringUtils.isNotEmpty(name), Employee::getUsername,name);
        //添加排序条件(根据更新时间排序)
        queryWrapper.orderByDesc(Employee::getUpdateTime);

        //执行查询
        employeeService.page(pageInfo,queryWrapper);

        return R.success(pageInfo);

    }

    /**
     * 根据id修改员工信息（启用、禁用，员工自己改信息）
     * @param employee
     * @return
     */
    @PutMapping
    public R<String> update (HttpServletRequest request, @RequestBody Employee employee){
        log.info(employee.toString());
   /*     使用公共字段填充替代
   //更新人，更新时间，
        Long empId = (Long) request.getSession().getAttribute("employee");
        employee.setUpdateUser(empId);
        employee.setUpdateTime(LocalDateTime.now());*/

//        service
        employeeService.updateById(employee);
        return  R.success("员工信息修改成功");

    }

    /**
     * 回显
     * @param id
     * @return
     */
    @GetMapping("/{id}")
    public  R<Employee> getById(@PathVariable Long id){
        log.info("根据id查询员工信息。。。");
        Employee employee = employeeService.getById(id);
        return R.success(employee);
    }


}
